Two useful points in your edit
A first frame extractor gives you the opening composition without scrubbing through a player. Use it to check how a clip starts, compare consecutive takes, or prepare an opening reference for another shot. It extracts an existing image; it does not create a new composition.
A last frame extractor gives you a visual reference for what comes next. The subject position, lighting and camera angle can guide a new image-to-video shot. A generated continuation is a separate clip, so review the join in your editor instead of assuming a seamless match.

